Funding for this research was provided by:
John Templeton Foundation (GF13666.154364)
Article History
Received: 7 December 2017
Accepted: 11 December 2018
First Online: 16 January 2019
Compliance with ethical standards
:
: Kaja Faßbender declares that she has no conflict of interest. Annika Wiebe declares that she has no conflict of interest. Timothy C. Bates declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.